Question

Find equation of the line passing through the point (4,-4) and (3,5).

Answer 1

by two point form,we have

y-(-4)/x-4=5-(-4)/3-4

y+4/x-4=9/-1

y+4=-9(x-4)

y-4=-9x+36

y=-9x+36+4

y=-9x+40

9x+y-40=0, is the required equation.